Matthew Henry Presbyterian @wholebiblehenry

This relates to the altar in this mystical temple, and that is mystical too; for Christ is our altar. The Jews, after their return out of captivity, had an altar long before they had a temple, Ezr 3:3. But this was an altar in the temple. Now here we have, I. The measures of the altar, Eze 43:13.

Commenting on Ezekiel 43:13-27

John Gill Reformed Baptist @doctorgill

And the altar shall be twelve cubits long, twelve broad,.... The length of it, from east to west, was twelve cubits; and the breadth, from north to south, was the same; so that it was a proper foursquare, as follows: Christ the altar, or the doctrine of his sacrifice and satisfaction for the sins of men, is the doctrine of the twelve apostles of Christ...

Jamieson-Fausset-Brown Reformed @jfbcommentary

square in the four squares--square on the four sides of its squares [FAIRBAIRN].